Converting Descending to Ascending Armor Class (AC)

Armor Class doesn't have to be confusing
Armor Class doesn’t have to be confusing

Practically everything I’ve read from the TSR days are much more interesting than anything published under WotC. So, if you play any OGL based systems (such as DCC, OSRIC, S&W, C&C, etc.), or 5e, then it’s necessary to convert older material in some fashion.

I looked at the D&D 5e conversion guide, and found that it wasn’t very helpful. Next I looked at key types of armor.

  • All systems start with a base AC of 10 except in Basic D&D where it is 9.
  • Leather gives an AC of 8 in AD&D and 7 in Basic. It is 11 in D&D 5e and 12 in DCC.
  • Chainmail gives an AC of 5 in AD&D and in Basic. It is 16 in D&D 5e and 15 in DCC.
  • Full plate gives an AC of 2 in AD&D (but 0 in Basic) and 18 in D&D 5e and DCC.
  • All of the other intervening armors were similarly close (or the same).
  • All systems modify by 1 (either + or -) for shields.

What I found was that you can set both systems equal at 10 (with Basic offset by 1) and simply go up and down by increments of one and it’s practically the same. Especially if you are using AD&D material in DCC. So, as VS would say, “No need to convert, adapt”. So, I created a simple little table that I think would work well.

AD&D Basic D&D D&D 5e DCC
22 21 -2 -2
21 20 -1 -1
20 19 0 0
19 18 1 1
18 17 2 2
17 16 3 3
16 15 4 4
15 14 5 5
14 13 6 6
13 12 7 7
12 11 8 8
11 10 9 9
10 9 10 10
9 8 11 11
8 7 12 12
7 6 13 13
6 5 14 14
5 4 15 15
4 3 16 16
3 2 17 17
2 1 18 18
1 0 19 19
0 -1 20 20
-1 -2 21 21
-2 -3 22 22

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Swords & Wizardry Complete Rulebook for Pay What You Want

This may be a limited thing, but I see the Swords & Wizardry Complete Rulebook up on RPGnow/DTRPG for “Pay What You Want”. This is normally $34.99.

Written by Matt Finch and Published by Frog God Games, I’ve really been meaning to read through this. I may be a bit wrong, but from my research, regarding retro-clones, S&W is to be based on the 1974 OD&D. And, this seems to have a lot of support.

S&W comes in three versions, an essential “White Box” version, an updated “Core” version with expanded rules, and this “Complete” rulebook which I gather combines all the above.

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Twelve Days of Free Frog God!

I got this email today 🙂

The holidays are about giving to those you appreciate and Frog God Games appreciates you. Each day from now until December 25th there will be a free PDF from our catalog (regularly priced between 4.99 and 17.99) .For the next 24 hours (give or take) the Slumbering Tsar Part 1 is free to everyone at the Frog God Games website- www.froggodgames.com.

No purchase necessary. Simply point your browser to our website and click on the ‘Free Downloads’ tab to find the daily PDF. The PDF will be available for every system it was released for as of today (Slumbering Tsar was only on Pathfinder). So check your email or the website everyday for another free release until December 25th. Free releases are only available for 24 hours before they return to regular price. The releases can be combined with existing coupons (like the 30% coupon from Humble Bundle or other yet to be announced special offers).

I notice that the free PDF is listed as “Holiday Day 1 — Slumbering Tsar: The Desolation, Part 1” in their “Free Downloads” section.